Author Description 18.11.2016 First edition 1.3. Manufacturer identifier, product Manufacturer: Pentair Manufacturing Italy Srl Via Masaccio, 13 56010 Lugnano di Vicopisano (PI) – Italy Product: Fleck 2910 - NXT 1.4. Intended use The device is intended for industry environment use only and it is purpose-built for water treatment.
Pentair Quality System EMEA products benefit, under specific conditions, from a manufacturer warranty that may be invoked by Pentair’s direct customers. Users should contact the vendor of this product for applicable conditions and in case of a potential warranty claim.
Installer Manual Fleck 2910 - NXT - Safety Safety 2.1. Safety pictograms definition Caution Warning Warns of a risk of minor injury or major Warns against serious personal injury material damage to the device or and damage to health. environment. Danger...
Installer Manual Fleck 2910 - NXT - Safety 2.3.1. Personnel Only qualified and professional personnel, based on their training, experience and instruction as well as their knowledge of the regulations, safety rules and operations performed, are authorized to carry out necessary work. 2.3.2.
Installer Manual Fleck 2910 - NXT - Description Model without transformer Warning A switch or circuit-breaker must be included in the installation, it must be suitably located and easily reached, it must be marked as the disconnecting device for the equipment. Warning...
Installer Manual Fleck 2910 - NXT - Description 3.3. Components description and location Upper power head Injector Brine valve Lower power head Brine valve switch Upper power head motor Upper piston switch Upper piston NXT controller Upper piston cam Brine valve cam Lower piston cam Status LED Lower piston...
Installer Manual Fleck 2910 - NXT - Description 3.4. System regeneration cycle Note This valve allows DF and UF regenerations. 3.4.1. DF regeneration cycle (5-cycles operation) Service — normal use Untreated water is directed down through the resin bed and up through the riser tube. The hardness ions attach themselves to the resin and are removed from the raw water being exchanged on the resin beads sodium ions.
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Installer Manual Fleck 2910 - NXT - Description Note For illustration purpose only. Always verify inlet and outlet marking on the valve. SERVICE NORMAL USE BACKWASH Valve Valve Drain Drain Inlet Outlet Inlet Outlet BRINE DRAW & SLOW RINSE RAPID RINSE Valve Valve From brine...
Installer Manual Fleck 2910 - NXT - Description 3.4.2. UF regeneration cycle (5-cycles operation) Service — normal use Untreated water is directed down through the resin bed and up through the riser tube. The hardness ions attach themselves to the resin and are removed from the raw water being exchanged on the resin beads against sodium ions.
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Installer Manual Fleck 2910 - NXT - Description Note For illustration purpose only. Always verify inlet and outlet marking on the valve. SERVICE NORMAL USE BRINE DRAW & SLOW RINSE Valve Valve From brine tank Drain Drain Inlet Outlet Inlet Outlet BACKWASH RAPID RINSE...
Installer Manual Fleck 2910 - NXT - System sizing Depending on the inlet water hardness, the service velocity for standard softening has to be between: Inlet water hardness Service velocity °F °dH [mg/l as CaCO [bed volume per hour] °TH 8 - 40 <...
Installer Manual Fleck 2910 - NXT - System sizing The maximum softened water flow rate that a softener can produce is given by the following formula: = Fs x BV service max service with: : service flow rate [m service max : service velocity [BV/h] service BV : bed volume of resin [m...
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Installer Manual Fleck 2910 - NXT - System sizing Resin exchange capacity as a function of the salt dosage for standard efficiency: Salt amount Corresponding resin exchange °F.m °d.m [g/L capacity in [g/L ] as CaCO resin resin 29.9 2.99 1.67 37.5 3.75...
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Installer Manual Fleck 2910 - NXT - System sizing Salt amount Corresponding resin exchange °F.m °d.m [g/L capacity in [g/L ] as CaCO resin resin 70.4 7.04 3.93 75.2 7.52 79.3 7.93 4.43 82.9 8.29 4.63 86.1 8.61 4.81 To calculate the system mass capacity: with: capacity resin...
Installer Manual Fleck 2910 - NXT - System sizing 4.2.4. Valve configuration Knowing the volume of resin, tank size and specifications of the resin, it is possible to determine the required valve configuration. The resin specification will give the backwash velocity, as well as the brine draw and slow rinse velocity that must be respected in order to ensure a proper regeneration of the unit.
Installer Manual Fleck 2910 - NXT - System sizing 4.2.5. Cycle time calculation From this point, the volume of resin, the tank size and the capacity of the softener are determined. Next step is to calculate the regeneration cycle time, which depends on the valve configuration and once again on the resin specifications.
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Installer Manual Fleck 2910 - NXT - System sizing To calculate slow rinse duration: The volume of water to be used for slow rinse is given in the resin manufacturers specifications. Generally speaking, it is advised that between 2 and 4 BV of water is used to perform the slow rinse after brine draw.
Installer Manual Fleck 2910 - NXT - System sizing 4.3. Injector flow rates (tables & graphics) The following tables and graphics represent the injectors flow rate as a function of the inlet pressure for the different injector sizes. 4.3.1. 1600 injectors series Brine draw Flow rate [L/min] Slow rinse...
Installer Manual Fleck 2910 - NXT - System sizing 4.3.4. 1710 Injectors series Brine draw Flow rate [L/min] Slow rinse Flow rate [L/min] 4.4. Defining salt quantities The salt settings are controlled through the controller programming. 32 / 98 Ref. MKT-IM-002 / A - 18.11.2016...
Installer Manual Fleck 2910 - NXT - Installation Installation Mandatory It is strictly forbidden for not qualified personal, to accede to system’s internal parts to perform any kind of technical action. Be sure to disconnect the electrical power, close the water inlet and depressurize the system before opening the front cover to access internal parts.
Installer Manual Fleck 2910 - NXT - Installation • When installing the water connection (bypass or manifold), first connect to the plumbing system. Allow heated parts to cool and cemented parts to set before installing any plastic parts. Do not get primer or solvent on O-rings, nuts, or the valve.
Installer Manual Fleck 2910 - NXT - Installation • Do not support the weight of the system on the valve fittings, plumbing, or the bypass. • It is not recommended to use sealants on the threads. Use PTFE (plumber’s tape) on the threads of the 25.4 mm (1") NPT elbow, the drain line connections, and other NPT/BSP threads.
Installer Manual Fleck 2910 - NXT - Installation 5.5.1. Top-mounted valve installation The valve and tank should not be supporting any part of the piping weight. This is hence compulsory to have the piping fixed to a rigid structure (e.g. frame, skid, wall…) so that the weight of it is not applying any stress on the valve and tank.
• In any case, any failure caused by improper installation and/or piping connections may void the warranty of Pentair products. • In the same way, using lubricant* on the valve thread is not allowed and will void the warranty for the valve and tank.
Installer Manual Fleck 2910 - NXT - Installation 5.7. Configuration types Metered: The controller monitors the volume of water used. Once it calculates that there is not enough capacity for the next days operation, a regeneration cycle will be initiated immediately or at a preset time. Time clock: The controller will regenerate based on a set time of operation days.
Installer Manual Fleck 2910 - NXT - Installation Inlet Outlet Valve Valve Meter Meter Tank Tank 5.7.3. Multiple valves with consecutive regenerations (System #6) This system works with 2 to 4 valves and a meter. During normal operation, the controllers of each valve display the time of day and the volume of water remaining.
Installer Manual Fleck 2910 - NXT - Installation 5.7.4. Duplex alternating (System #7) This system works with 2 valves and a meter. During normal operation, the controllers of each valve display the time of day and the volume of water remaining.
Installer Manual Fleck 2910 - NXT - Installation 5.7.6. Multiple valves, demand (System #14) This system works with 2 to 4 valves and operate as part of a multi-tank regeneration system. Each tank in the system will have an active flow meter input, even in standby. The number of tanks in service depends on the flow rate.
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Installer Manual Fleck 2910 - NXT - Installation 3. The flow rate demand decreased below the first trip point. The tank returns to standby. Inlet Outlet Meter Meter Meter Meter Valve Valve Valve Valve Tank Tank Tank Tank Flow rate demand Stand-By Stand-By Stand-By...
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Installer Manual Fleck 2910 - NXT - Installation 5. The third tank returns to standby as demand decreases past the second trip point. Inlet Outlet Meter Meter Meter Meter Valve Valve Valve Valve Tank Tank Tank Tank First trip point Service Stand-By Stand-By...
Installer Manual Fleck 2910 - NXT - Installation 5.7.6.2 System operation in regeneration Inlet Outlet Meter Meter Meter Meter Valve Valve Valve Valve Tank Tank Tank Tank Full capacity ¾ capacity ½ capacity ¼ capacity 4th in standby 3rd in standby First trip point New primary programmed rate...
Installer Manual Fleck 2910 - NXT - Installation 5.9. Connections (electrical) Black Violet HCAM: Upper piston cam Green LDM: Lower power head motor Brown Inhibition signal UDM: Upper power head motor Yellow Remote regen signal start Sw1: Upper piston switch White External signal during service Sw2: Brine valve switch...
Installer Manual Fleck 2910 - NXT - Installation 5.10. Bypassing A bypass valve system should be installed on all water conditioning systems. Bypass valves isolate the softener from the water system and allow unconditioned water to be used. Service or routine maintenance procedures may also require that the system is bypassed.
Installer Manual Fleck 2910 - NXT - Installation 5.11. Drain line connection Note Standard commercial practices are expressed here. Local codes may require changes to the following suggestions. Check with local authorities before installing a system. Mandatory The drain line must be build with 1" PVC rigid tube with an air gap must be present at the drain.
Installer Manual Fleck 2910 - NXT - Installation 5.12. Overflow line connection In the event of a malfunction, the brine tank overflow fitting will direct “overflow” to the drain instead of spilling on the floor. This fitting should be on the side of the brine tank. Most tank manufacturers include a post for the tank overflow connector.
Installer Manual Fleck 2910 - NXT - Programming 6.3. Setting the time of the day Set the time in the system. Mandatory In multiple valve systems, set the time of day on the lead valve (#1). Note The time of day will be automatically updated on the other valves in the system within 10 seconds.
Installer Manual Fleck 2910 - NXT - Programming 6.4.2. System type Select the system in which the valve(s) operate(s). Options: • 4: single valve; • 5: multiple valve with lockout; • 6: multiple valve with consecutive regenerations; • 7: duplex alternating; •...
Installer Manual Fleck 2910 - NXT - Programming 6.4.4. System size Set the number of valves to be connected (2 to 4 valves) in the system. Note Only visible in multiple valve systems and only present on the master #1 valve. Options: •...
Installer Manual Fleck 2910 - NXT - Programming 6.4.7. Regeneration flow Set the direction of flow during the brine draw cycle. Note The availability depends on the valve type programmed in the previous step. Options: • Co-current; • Counter-current; • Counter-current dry salt.
Installer Manual Fleck 2910 - NXT - Programming 6.4.9. Display unit Set the unit system to be used. Options: • US display: volume in gallons, time display 2 x 12 hours, hardness in grain; • Metric format: volume in liter, time display 24 hours and hardness depends on the language: EN: mg/L as CaCO FR: °F DE: °dH...
Installer Manual Fleck 2910 - NXT - Programming 6.4.13. Calendar override Set the maximum number of days that the valve is in service without regenerating, regardless from the volume of water used. Note For a timeclock valve, this value must be set. For metered valves, it is regenerated once the amount of days is reached at a preset time unless the meter triggers regeneration before.
Installer Manual Fleck 2910 - NXT - Programming 6.4.15. Programming regeneration cycle times Set the cycle times of the regeneration. Note Five cycles can be set. The system displays the programming cycle. The display allows setting of a specific time for each cycle. If a cycle is set to NO, the next cycles is not activated. 1 Backwash: 10 min AD Adjust the number of days with CYCLE 1 00:10:00...
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Installer Manual Fleck 2910 - NXT - Programming Relay activated AI Set the relay activation time with beginning of regeneration AJ Press to validate the selection and advance to the next AUX RELAY REGEN parameter. START: 00:00:00 Relay deactivated 10 min. AK Set the relay deactivation time with after the start of regeneration AL Press...
Installer Manual Fleck 2910 - NXT - Programming 6.4.18. Parameters saving Note When the last parameter is set and the button pressed, the controller updates the database based on the new programming. Wait until programming is finished, this may take a few seconds.
Installer Manual Fleck 2910 - NXT - Programming 6.5.4. Totalizer Note The controllers registers the total volume of treated water that passes through the meter since start-up (or last hard reset). TOTALIZER To reset, press and hold the buttons for 5 seconds until the display shows zero.
Installer Manual Fleck 2910 - NXT - Programming 6.5.8. Valve position Note Shows the position of the valve in a multiple valve system, also called the valve address. VALVE ADDRESS: 6.5.9. Software version Note Shows the version of the software used by the controllers. Mandatory...
Installer Manual Fleck 2910 - NXT - Commissioning Commissioning Note This chapter is available for standard regeneration types. Contact your supplier if the actual regeneration is not standard and if you need assistance. 7.1. Water filling, draining and waterproofness inspection 7.1.1.
Installer Manual Fleck 2910 - NXT - Commissioning 7.1.2. Activating a multiple valves system (Systems #5, #6, #7, #9 and #14) Follow the previous procedure for each tank of the system. Note In order to gain time, program first all tanks as single system #4. Proceed to start up as described above for each tank, then program the correct system type and valve address and eventually set/trip points in case of system #14.
Installer Manual Fleck 2910 - NXT - Commissioning Dosage Polystyrene resin: set 1.25 mL fluid per 1 L of resin. Non-resinous exchangers: set 0.85 mL fluid per 1 L. Brine tank softeners Backwash the softener and add the required amount of hypochlorite solution to the well of the brine tank.
Installer Manual Fleck 2910 - NXT - Operation Operation 8.1. Display 8.1.1. During service • Single valve in service in timeclock mode: 4#- SRV 15:25HR REGEN IN 03 DAYS • Single valve in service in volume immediate or delayed mode: 4#- SRV* 14:24HR...
Installer Manual Fleck 2910 - NXT - Operation 8.2. Recommendations • Use only regeneration salts designed for water softening in accordance with EN973. • For optimal system operation, the use of clean salt, free from impurities, is recommended (for example salt pellets). •...
Installer Manual Fleck 2910 - NXT - Maintenance Maintenance Mandatory Cleaning and maintenance shall take place at regular intervals in order to guarantee the proper functioning of the complete system, and be documented in the Maintenance chapter in the User Guide document. 9.1.
Installer Manual Fleck 2910 - NXT - Maintenance 9.2.2. Replacing the upper power head motor Operation Using a flat screwdriver, unscrew (1) and open the cover (2). Using a flat screwdriver, unscrew (3) and open the controller (4). Using a pliers, remove the connecting pin (7). Using a flat screwdriver, unscrew (6) and remove the motor (5).
Installer Manual Fleck 2910 - NXT - Maintenance 9.2.3. Replacing the upper motor cams and micro-switches Operation Using a Phillips screwdriver, unscrew (1) and extract the micro-switches (2). Using pliers, remove the pins (4). Replace the cams ensuring they are in the same position (3). Reverse above procedure steps to rebuild Ref.
Installer Manual Fleck 2910 - NXT - Maintenance 9.2.4. Replacing the lower power head motor Operation Using a flat screwdriver, unscrew (2) and open the cover (1). Using a pliers, remove the connecting pin (4). Using a 6 mm Allen key, unscrew (3) and remove the motor (5). Reverse above procedure steps to rebuild 72 / 98 Ref.
Installer Manual Fleck 2910 - NXT - Maintenance 9.2.5. Replacing the lower motor cams and micro-switches Operation Using a Phillips screwdriver, unscrew (3), extract the micro-switches (2) and protections (1). Using a 6 mm wrench, unscrew (10), remove the washer (9) and the pointer (8). Using a pliers, remove the circlip (7) and the arm (6).
Installer Manual Fleck 2910 - NXT - Maintenance 9.2.6. Replacing the upper piston and/or seal and spacer kit Operation Using a 20 mm wrench, unscrew the brine valve nut (1). Using a flat screwdriver, unscrew (3) and open the cover (4). Using pliers, remove the connecting pin (6).
Installer Manual Fleck 2910 - NXT - Maintenance 9.2.7. Replacing the lower piston and/or seal and spacer kit Operation Using a flat screwdriver, unscrew (1) and open the cover (2). Using a pliers, remove the connecting pin (5). Using a 6 mm Allen key, unscrew (3) and remove the lower power head (4). Using a pliers, remove the piston (8).
Installer Manual Fleck 2910 - NXT - Maintenance 9.2.8. Cleaning the injector Operation Using a 8 mm and a 20 mm wrench, unscrew the screws (1) and the brine valve nut (2). Using flat screwdrivers, remove the injectors (5) and (6) from injector body (8). Clean the injectors (5) and (6) and the filter (7) using compressed air, a soft brush or possibly a pin.
Installer Manual Fleck 2910 - NXT - Troubleshooting Troubleshooting 10.1. Error detection Note It can take up to 30 seconds before an error can be detected and displayed. Mandatory All the errors must be displayed on each controller before they can be corrected. •...
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Installer Manual Fleck 2910 - NXT - Troubleshooting Problem Cause Solution Determine if micro-switch or Controller cycles Maladjusted, broken or shorted controller is faulty and replace it, continuously micro-switch. or replace complete power head. Iron buildup in line to water Clean line to water softener.
Installer Manual Fleck 2910 - NXT - Troubleshooting 10.2. Programming error If reprogramming the unit clears the error, the remaining volume may be reset to full unit capacity (as though it had just regenerated). • All the units in service remain in service; •...
Installer Manual Fleck 2910 - NXT - Troubleshooting 10.3. Examples of error displayed • The unit 2 has been reset. DETECTED ERROR = → Reprogram the unit. RESET UNIT DETECTED • There is no message from unit 3. ERROR →...
Installer Manual Fleck 2910 - NXT - Spare parts 11.2. Valve parts list Packaging Item Part number Description quantity Power Head 2510/2750/2850/2910 VCPHINDUS1 See 11.3. Lower power head parts list, page 86 28416 Piston Assembly 2910 Upper DF 28417 Piston Assembly 2910 Upper UF 28415 Seal &...
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Installer Manual Fleck 2910 - NXT - Spare parts Packaging Item Part number Description quantity Injector See 11.7. 1600 / 1650 injector parts list, page 92 BU28515-01 Valve Body Assembly 2910 DF BU28515-02 Valve Body Assembly 2910 DF/NBP BU28515-03 Valve Body Assembly 2910 DF HW BU28515-04 Valve Body Assembly 2910 DF/NBP HW BU28515-05...
Installer Manual Fleck 2910 - NXT - Spare parts 11.4. Upper power head parts list Packaging Item Part number Description quantity Transformer 60VA 26260 Power Cord European Black 11545 Controller Assembly NXT BU28713 Circuit Board NXT BR61702-03 Harness Pulse Controller 3230 (not shown) 28008 Harness Motor ex 11667 (not shown) 40400...
Installer Manual Fleck 2910 - NXT - Spare parts 11.6. 1700 / 1710 injector parts list Packaging Item Part number Description quantity 23477 Screw 11893 Injector Cover 10229 Injector Body Gasket 17777 Injector Body 3C-5C 15414 Nut and Sleeve Assembly 15413 Male Elbow 23304...
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Installer Manual Fleck 2910 - NXT - Spare parts Packaging Item Part number Description quantity 10228 Injector Cover 13771-01 O-ring 17777-03 Injector Body 6C-7C Ref. MKT-IM-002 / A - 18.11.2016 91 / 98...
Installer Manual Fleck 2910 - NXT - Spare parts 11.9. Kit meter & Meter cables list Packaging Item Part number Description quantity 28283 Kit Meter NT - NXT 1" Brass 28284 Kit Meter NT - NXT 1½" Brass 28285 Kit Meter NT - NXT 2" Brass 28295 Kit Meter NT - NXT 2"...
Installer Manual Fleck 2910 - NXT - Spare parts 11.12. Other components list Mixing assembly Rotating Side Mount Adapter Rotating Side Mount Adapter Kit 51 Kit 57 Brine Packaging Item Part number Description System quantity BU61564-10 Mixing Assembly 1" Industrial 1600/1710 Rotating Side Mount Adapter 61415-20...
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